How should I save my graphics?
The most universally supported file formats on the Web are .gif and .jpg format. In general, use .gif format for graphics that have few colors, graphics that contain text or type, or graphics that have large areas of a single color. Use .jpg format for graphics that have many colors and lots of fine detail, such as photos. It is NOT recommended to use bitmapped graphics with Moodle. These files are very large and can affect your course performance, as they are slow to load, especially for modem users. Many scanners default to .bmp files, so make sure you check this if you are scanning photos or images.
It is also important to remember that Moodle will upload all graphics in their original size. Make sure that you have resized and saved your graphics in an appropriate size for your course site. There are recommended sizes shown in the Page Editors when uploading course banners and staff photos.